At 18:15 +0200 7/15/11, Gorka L Martinez Mezo wrote: >A few months ago I purchased through LEM swap a nice Macintosh IIci. The >computer arrived in good overal condition and had been carefully cleaned both >inside and outside. Afer a quick check, I hooked an ADB keyboard and an Apple >color display and fired it up. However, nothing happened. I let the computer >hooked to the main for a few hours and tried again. Nothing. I contacted the >seller but she refused to answer back. I was suspecting some kind of problem >with the PRAM battery, but due to personal reasons (work, new baby, moving...) >I wasn`t unable to take care of the computer. I ordered a fresh battery from >OWC and today I disassembled the computer to check the battery and change it. >Of course, it was old and leaked stuff on the battery older. I removed the old >battery and checked the holder. One of the metal clips, with was in contact >with the battery (+) which leaked has some damage but seems to be OK; the rest >of the older and the logic board are clean as battery goo never went from the >(+) clip. > >So my questons are: > >Can the holder clip be cleaned to remove all the stains from the battery acid? >Would it be safe to put another fresh battery without cleaning the clip?
At 10:28 -0600 7/15/11, Alex Barnes wrote: >I'd get some contact cleaner or 100 proof vodka to clean the contacts. >On Jul 15, 2011, at 10:15 AM, Gorka L Martinez Mezo wrote: > Make that 200 proof. The stuff that comes out of the battery is probably KOH potassium hydroxide. Hot water is a good solvent for that. And water won't hurt the circuit board so long as it's rinsed well and not turned on until it's thoroughly dried out. Try an old toothbrush. You could consider soldering in a replacement cell. They come with wires attached for that. Dry alcohol is a way to rinse out remaining water. The alcohol mixes well with the water and the combination evaporates rapidly. But dry alcohol is tough to find. I use 99% isopropyl alcohol which can be found at professional cleaning shops. Dry ethanol, 200 proof, comes only with a license, at least here in the US of A. Rubbing alcohol, denatured alcohol, and booze come with other stuff in it that might, or might not, be harmful and nobody will tell you what's there. The well told story is that, in the days of prohibition, the test was to see if something offered as alcoholic was done with a match. It was 100 proof, about 50% alcohol, if it burned. -- --> From the U S of A, the only socialist country that refuses to admit it. <-- -- ----- You received this message because you are a member of the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/
